| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] it [vb mod] | 1993 |
|
| 2 | [adj] it [vb mod] | 1248 |
|
| 3 | difficult [pron] [vb mod] | 54 |
|
| 4 | difficult [pers pn] [vb mod] | 54 |
|
| 5 | difficult it [modal v] | 43 |
|
| 6 | difficult it [vb mod] | 43 |
|
| 7 | difficult it [vb mod] | 43 |
|
